From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 75CE2C0044C for ; Mon, 5 Nov 2018 22:52:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4493C2081C for ; Mon, 5 Nov 2018 22:52:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4493C2081C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=davemloft.net Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388265AbeKFIOa (ORCPT ); Tue, 6 Nov 2018 03:14:30 -0500 Received: from shards.monkeyblade.net ([23.128.96.9]:35584 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388180AbeKFIOa (ORCPT ); Tue, 6 Nov 2018 03:14:30 -0500 Received: from localhost (unknown [IPv6:2601:601:9f80:35cd::cf9]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id AE5A614920CC7; Mon, 5 Nov 2018 14:52:29 -0800 (PST) Date: Mon, 05 Nov 2018 14:52:27 -0800 (PST) Message-Id: <20181105.145227.1208804116999835276.davem@davemloft.net> To: jolsa@redhat.com Cc: acme@kernel.org, linux-kernel@vger.kernel.org, namhyung@kernel.org, jolsa@kernel.org Subject: Re: [PATCH RFC] hist lookups From: David Miller In-Reply-To: <20181105203447.GA25674@krava> References: <20181104201821.GA22049@krava> <20181104.165039.878682622135788379.davem@davemloft.net> <20181105203447.GA25674@krava> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Mon, 05 Nov 2018 14:52:29 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jiri Olsa Date: Mon, 5 Nov 2018 21:34:47 +0100 > I put something together.. still testing, but it's already > showing 0 lost events when for 'overwrite = 0' case even > for high load.. the old code shows ~1500 for same workload > > I'm printing lost event counts in stdio output header: > > # perf top -d 1 --stdio > PerfTop: 5734 irqs/sec kernel:57.3% exact: 100.0% lost: 0 [4000Hz cycles:ppp], (all, 8 CPUs) > > will probably add it to tui as well, seems useful > > I pushed it in perf/fixes branch in: > git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git > > it's stil work in prograss.. not too manye complete changelogs ;-) Looks interesting! I'll play with this on sparc64 later, thanks!